﻿using System;
using System.Linq;

    class NFactDivideByKFact
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int k = int.Parse(Console.ReadLine());

            decimal factorialN = 1;
            decimal factorialK = 1;
            while (true)
            {
                if (n <= 1)
                {
                    break;
                }
                factorialN *= n;
                n--;
            }
            while (true)
            {
                if (k <= 1)
                {
                    break;
                }
                factorialK *= k;
                k--;
            }
            Console.WriteLine("N!/K!={0:0.00}",factorialN/factorialK);
        }
    }

